Built for SQ with some extra in reserve for those occasions when its time to demo. 4V outs from the Alpine to the JL amps. The 300/2 feeds Boston Acoustics Pro 6.5 3 way components. The 1000/1 feeds the 3 10W6v2s. The ported enclosure for the subs is made out of 3/4" MDF, 2.2 cubic feet total and tuned to 36 Hz.